Fitbit let me test its new models—the heart-rate-tracking Charge 2 and the ultra-slim swimproof Flex 2—with an intense interval workout on a scenic San Francisco rooftop last Thursday. And my legs are still sore.

What started as a way to count 10,000 steps per day is now a full health and fitness platform, tracking all kinds of exercise, keeping an eye on your heart rate both in motion and at rest, prompting you to keep moving throughout the day, and calming you down with deep breathing exercises. The new devices are both worthy upgrades to the models they’re replacing, and now the Fitbit app supports pairing more than one device, in case you want to use a Charge 2 for most of the day, and switch to the Flex 2 for swimming or a more discreet evening look.

IDC’s smartwatch sales estimates for the second quarter of 2016 are in, and the news isn’t great, particularly for Apple.

According to IDC’s latest report, worldwide smartwatch sales slumped 32 percent in the second quarter of 2016, when compared to the same period last year. Much of the drop is due to an apparent decline in Apple Watch sales, according to IDC. The research firm estimates that Apple shipped 1.6 million smartwatches in the quarter, down from 3.6 million a year earlier.

Overall, smartwatch makers shipped a total of 3.5 million devices in the April-to-June quarter, IDC says. That compares to a total of 5.1 million in the year-ago quarter.

The tech world was a very different place in 1995. Back then, a 100MHz processor was considered powerful, the upcoming Copland operating system was going to be Apple’s next big thing, and Windows 95 was going to change everything on the PC side of things.

As if to prove the point, Nick Lee of mobile app development firm Tendigi Studios hacked his Apple Watch to run Microsoft’s one-time flagship operating system.

To get the hack to work, Lee ported the Bochs x86 emulator to the Apple Watch, using a technique that lets you “patch certain files within a WatchKit app to load your own application code rather than Apple’s.” He then dropped a Windows 95 disk image into the app he created to finish the project.

Wearable gaming is still young, and it hasn't exploded in popularity like games on the iPhone and iPad did, but the Apple Watch has some interesting play experiences. The best of them leverage the wrist-based design to spice up your day with little quests or tidbits of fun, whether you're responding to messages from a fictional character or completing a daily brain-teaser.

Sphero’s BB-8 droid is learning a new trick in time for the Star Wars: The Force Awakens Blu-ray release. Users can now set up the toy hover-droid to react in sync with the film, whistling and whirring at all the appropriate moments.

This does take some dedication, however. As Gizmodo notes, users will want to keep their smartphones plugged in, because the BB-8 companion app must run throughout the movie and listen for audio cues via the phone’s microphone. (The app also chimes in with its own fun facts and movie details as you watch.)

The Apple Watch isn’t a must-have like your iPhone, but Apple’s most personal device has the potential to change the way we interact with other people—and our phones. We're now almost a year into wearing our watches, and they've improved with a major software upgrade (watchOS 2), new band options, and a price cut.

What does watchOS 2 have to offer? What’s it like to use an Apple Watch, and is it even worth buying? We answer all these questions and more in this ultimate guide to Apple Watch. If you think of any more questions, let us know in the comments.

Swiss watch makers are feeling the effects as more people choose to strap smartwatches to their wrists.

Last quarter, smartwatch shipments overtook Swiss watches for the first time, according to new research from Strategy Analytics. Smartwatches saw a 315.6 percent shipment increase from Q4 2014, reaching 8.1 million units. Meanwhile, Swiss watch shipments fell to 7.9 million units, a 4.8 percent year-over-year decrease.

Checking your heart health will no longer necessarily require a visit to the doctor or an uncomfortable strap. The new MocaHeart tracker by MocaCare can indicate several heart conditions by simply scanning your thumbs and sending the data to your smartphone.

The MocaHeart uses thumb scans to measure your blood velocity, and takes the determined velocity to calculate your heart rate, blood oxygen levels, and cardiovascular health. MocaCare has developed the proprietary Moca Index to give a snapshot on overall heart health on simple 1-5 scale (Low, Ideal, Raised, High, or Very High) as determined by your blood velocity. The Moca Index is a measurement of blood flow, which is correlated to blood pressure. Generally the faster the blood flows through the blood vessels, the higher the blood pressure.

If the eyes are the windows to the soul, the things we search Google for day in and day out might be the windows to our brains—or at least what most captured our minds, as a global society, during the past year.

Google on Wednesday released its lists of the biggest trending topics of 2015, namely the ones that got the biggest spike this year versus 2014. The lists are presented interactively, letting you refine the search by country, drill down by topic, and even flash back to earlier years to see how our online obsessions have changed over time.

Globally, the top 10 biggest trending topics include a mix of entertainment and breaking news, sometimes both, as in the case of the No. 1 search, “Lamar Odom.” The retired NBA star and estranged husband of Khloe Kardashian fell into a coma in October of this year, which means searches for him must have spiked a lot to take the crown for all of 2015. The top 10 is rounded out by Charlie Hebdo, Agar.io (a hit browser game that was ported to iOS and Android), Jurassic World, Paris, Furious 7, Fallout 4, Ronda Rousey, Caitlyn Jenner, and American Sniper.

Pebble is making it easier to keep track of fitness goals with an update to its latest smartwatches.

With the new Pebble Health app, users can count their steps and get automatic sleep tracking on the Pebble Time, Pebble Time Steel, and Pebble Time Round. The app presents a running average of the user’s activity, along with weekly step and sleep graphs. Both measurements can feed into Apple’s HealthKit or Google Fit for viewing on a smartphone and correlating data with other fitness apps.

On Thursday, GoPro updated its iOS app to integrate a new app for Apple Watch, turning the Watch into a remote control for the Wi-Fi equipped GoPro cameras. You can now use the Apple Watch app to start or stop recording, adjust the settings on the GoPro, and tap to add a HiLight (basically a bookmark) to a certain section of video to make it easier to find in the editing room.

The new Apple Watch app also acts as a remote viewfinder to frame your shots before recording, and you can add a Complication, or shortcut, on the face of your Watch to hit record and capture those easy-to-miss action shots. GoPro’s Apple Watch app was first demonstrated during Apple’s September event.